Aeterno turns home energyinto decisions you can defend.Home by home, street by street.
We maintain a model of every home you answer for, with or without live data, and it improves as evidence arrives.
We build the decision layer for home energy, from Bath, England.
We build the engines, the models and the products ourselves, for the people who have to stand behind the numbers.
Aeterno Ltd is registered in England and Wales, company number 12917530, based in Bath.
Built so you can rely on it, and check that you can.
Documented delivery
Work is scoped in writing before it starts, with acceptance criteria agreed up front, and is judged against them.
Continuity by design
Delivery and operations are documented so that nothing about your deployment depends on any one person. Escalation is named in the contract.
Governed operations
Every outbound action from the platform needs an approval token and lands in an append-only journal, so what happened is on the record.
Your tenancy, your boundary
Each customer runs in its own tenancy, with contractual data boundaries.
What you can verify before the first call.
- In production with a global heat pump OEM.
- Both calculation engines are cross-validated against output from government-approved SAP software.
- A live governed platform: every screen resolves against a governed viewpoint, and every claim carries its validation status, including the red ones.
- Three patent families filed; the two covering this product were filed before any customer ever saw it.
- The same engines power a reconstruction of UK housing stock covering around 18 million dwellings.
What you cannot yet verify from public material is breadth: one manufacturer account is named nowhere, and the housing work is at the first-diagnostic stage. We say so because you would find out anyway.